Puriti
Aquarium Advice Addict
My friends red tailed shark is swimming upright against the glass in one area and not moving from that spot. I usually don't see him out an about because he hides in the castle but since I took the castle out he's being more out and antagonizing all fish that are dark colored and will now just swim up against the glass in the front like it's one of my oto cats only he's not being stuck to the glass with his mouth but just swimming there.